Vacuum cleaner



H. SHlGYO VACUUM CLEANER April 22, 1930.

Filed Dec. 1' 1925 In #622 for Patented Apr. 22, 1930 PATENT OFFICEHACHIRO SHIGYO, OF SAN FRANCISCO, CALIFORNIA VACUUM Application filedDecember The present invention relates to vacuum cleaners and isprimarily-for the prevention of the escape of tine particles of dustfrom the refuse receptacle of the device.

Among the objects of the invention are included the following Theprovision of an ovcrcoating for the ordinary vacuum cleaner bagcomprising a layer of material to absorb the dust particles which escapefrom the refuse receptacle;

The enclosing of a vacuum cleaner bag within an overcoating bag disposeda relatively short distance therebetween whereby to provide adust-catching chamber which will collect the dust which filters throughthe inner bag;

The addition to a vacuum bag of a receptacle adapted to enclose thei'etuserollet-ting bag of a vacuum cleaner, and to provide a meanswhereby the projection into the at mosphere of fine dust particles fromthe porous refuse bag of the cleaner is avoided; and

The provision in a vacuum cleaner of an 5 overcoating member havingmeans for ready attachment and detachment to and about the refuse bag,and providing a barrier of a plurality of layers preventing the escapeof fine dust particles into the atmosphere, the texture of theovercoating member being such that dust particles escaping through theinner bag are arrested by the material of the outer bag These, and suchother objects as may hereinafter appear, are obtained by the novelconstruction, combination, and arrangement of the various elements whichconstitute the invention. One form which the invention may take isillustrated in the accompanying drawing, comprising one sheet, and whichis hereby made a part of this application.

In said drawing Figure 1 is an elevation showing an overcoat-ing bagforming the subject matter of this application for patent in properplace upon a conventional vacuum cleaner.

Figure 2 is a fragmentary elevation showing the structure of theovercoating bag at its mouth, and the manner in which said bag isattached to a vacuum cleaner.

Like reference characters are used to desig- CLEANER 17, 1925. SerialNo. 75,959.

nate similar parts in the drawing and in the description of theinvention hereinafter given.

In Figure 1 is illustrated a vacuum cleaner of a conventional type. Thecleaner comprises generally a body 10, a handle 11, a motor casing 12, apump casing 13, castors and wheels 14, a suction end or mouth 15, arefuse bag or reservoir 16 adapted to be secured to the body 10 at theflanged portion 17, and a locking ring or collar 18 whereby such bag 16is secured to the flanged portion 17.

The construction shown is that of a conventional type of cleaner now onthe market, but such typical form for a cleaner not essential to thesuccess of the present invention, which may be adjusted by slight changein dimensions, if any changes Whatever are necessary, to fit upon othertypes of vacuum cleaners. In its present general form, the invention isadapted to be used universally so far as the applicant is informed andadvised at present.

A loop 19 is attached to the end of the bag 16, and said loop is adaptedto be attached to a hook member 20 secured upon the handle 11.

The present form of the invention comprises a bag of the same generalconfiguration as that of bag 16. Said bag is designated 21 and comprisesan outer layer of material 22, and an inner layer of material 23. Thebag 21 is generally cylindrical in configuration, and it has a circularend portion 24, also of two thicknesses of material. Through the end 24is an aperture 25 through which the loop portion 19 of bag 16 may beprojected, whereby said bag 16 and the overcoating bag 21 are readilysecured upon the hook 20.

The texture of the walls of the end 24 about the aperture 25 are closelysewed together or otherwise attached to form an eye worked in a mannersimilar to a buttonhole. At its other end. the bag 21 has a slit portion26. Said slit portion 26 may be formed as an incident to theconstruction of the bag 21 which bag is generally formed from flatpieces of material joined at their ends to provide a longitudinal seam27.

On the material of the bag 21 at one side of the vent 26 are the femalemembers of a number of snap fasteners 28 and on the other side of saidvent 26 are the male members of said fasteners. At the innermost end ofthe bag 21 is a hem 29 within which is secured an elastic band or othermember, (not shown), the ends of which elastic member are anchored atopposite sides of the vent 26. A hook 30 and an eye 31 provide means forsecuring the innermostend of the bag 21 and the ends of hem 29 about thecollar 18, where said bag 21 is securely held to the cleaner by thegripping tension of the elastic member contained within the hem 29 andwhich is coextiensive with the material of bag 21 at said en The bag 21may be attached to the cleaner in the following manner.

The round or top end of the refuse bag 16 is manually released from thebook 20. The overcoating bag 21 is slipped over the bag 16 and the loop19 is projected through the aperture in bag 21. The loop 19 may then bereplaced upon the hook 20.

The lower end of the bag 21 is drawn downwardly over bag 16 as far as itis possible to draw it, and until the hemmed portion 29 may be readilywrapped about the collar 18. When so wrapped, the hook and eye, 36 and31, and the snap fasteners 28. are in a position to be secured one toanot-her. This final step of attaching the bag 21 will secure it firmlyin place. The apparatus is now in condition for operation, and thevacuum cleaner is manipulated in the same manner as if the overeoatingwas omitted.

The dust particles which pass through the bag 16, and these are quitenumerous and annoying as tests will show, are arrested either by thefirst or inner layer of material, 23 or by the second or outer layer 22of material. in the bag 21. The layers of material 22 and 23 are of arelatively closely woven cloth through which dust will not readilyfilter, but which cloth permits relatively free passage of the airpumped into the bag 16 and escaping therefrom through its poroustexture.

The bag 21 may be removed from the device at any time desired, and thedust gathered therein, the greater amount of which will accumulatewithin the bag 23, may be shaken therefrom or otherwise removed. The bagmay be turned inside out and beaten. The dust particles intermediate theba i s 22 and 23 are relatively few in quantity and the bag 21 willordinarily be worn out completely before it is necessary or desirable toremove the accumulation of dust particles between the layers 22 and 23.

When the bag 21 is to be removed from the device, the hook is separatedfrom eye 31, and the fasteners 28 separated, when the bag 21 may beremoved. It is pulled over bag 16 as the final step of separation.

It will be found from an examination of the atmosphere after the deviceis used with the overcoat thereon that the quantity of dust in the airis much less than the quantity which would be found or which is foundwhen the bag 16 is used without the auxiliary bag 21. In fact, thequantity of dust remaining in the atmosphere when bag 21 is used isnegligible.

I claim:

A dust confining chamber for a vacuum cleaner having the usual refusereceiving container, and comprising a generally cylindrical outer bagadapted to removably snugly surround said usual refuse receivingcontainer of said vacuum cleaner and having a slit extending inwardly ashort distance from the mouth of said outer bag and a band reinforcingsaid mouth, there being one character of inter-engaging means on theoverlapping portions of the material of said outer bag about said slitto maintain said overlapping portions in overlapping closed relation,and a second fastening means of a difierent character at the ends ofsaid band, said fastening members enabling the convenient associationand disassociation of said encircling bag with said usual refusereceiving container and to prevent lateral disassociation of theportions of the material about said slit, said outer bag at the endremoved from its mouth being provided with a centrally disposed apertureto admit the passage therethrough of, and interlocking engagement with,the fastening means intermediate said usual refuse receiving containerand said vacuum cleaner.

In testimony whereof I aflix my signature.

HACHIRO SHIGYO.

